Train Smarter.
Race Better.
Data-driven tools for endurance athletes. Nail your nutrition, pacing, and race day strategy — no fluff, just numbers.
The Lab Tools
Fuel Strategy
Most athletes under-fuel without knowing it. Find out exactly what your body needs per hour.
Plan FuelSweat Test
Calculate your hourly fluid target so you replace what you lose, before cramps tell you that you didn’t.
Run TestPacing Strategy
Your finish time is just math. Enter a target time to find your required pace, or enter your pace to see your projected finish.
Find Your PaceHR Zone Finder
Your zones are unique to you. Stop using generic charts and get numbers that actually match your fitness.
Find Your ZonesFrom the Lab
How to Calculate Your Sweat Rate at Home
You don’t need a lab. Just a scale, a water bottle, and 60 minutes of training. Here’s the exact method.
Brick Workouts Explained: Why They Matter and How to Start
The first time you run off the bike your legs feel like concrete. Here’s how to fix that before race day.
The Difference Between Bonking and Cramping (and How to Fix Both)
They feel similar but have completely different causes. Getting this wrong mid-race is costly.